Ruler.



PATENTED AUG. 4, 1908.

H. J. KIMMEL.

RULER.

APPLIUATION FILED man, moa.

u UNITED stri-iras 'PATENT onirica. f l* HARRY J. RIMMEL, OF WENATCHEE, WASHINGTON, ASSIGNOR OF ONE-HALF TO SOLOMON W'.l KIMMEL, OF WENATCHEE, WASHINGTON.

RULER.

Specification of Letters Patent.

Patented Aug. 4, 1908.

appresso sied February 2s, 190s. seri-.1 No. 417,940.

' o all lwhom, 'it Vmay concern:

Be it known that I, HARRY J. KIMMEL, a citizen of the United States, residing at Ienatchee, in the county of Clielan and State of 5 Washington, have invented new and useful Improvements in Rules, of which the following is a specification.

This invention relates to rules, the principai object of. the invention being to provide a novel forni of adjustable tension -joiiit for connecting the ysections and arms of an ordinai'lyT folding rule such as is used by mechanics in every-day work whereb the sections of fthe rule may be maintainer in the proper binding relation to each other to adapt the rule to be used in a strained-out condition aiidavoid the untiinel collapse of the rule. Yth the above andY other objects in view, the nature of which will more fully appear as the description proceeds, the invention consist-s in\the novel construction, combination and arrangement of paits as herein fully described, illustrated aiid claimed.

Iii the accompanying drawings z-Figure 1 is a plan view of a rule embodying the present invention, showing the manner of utilizing the protracting feature thereof for laying oii' angles. Fig. 2 is an enlarged plan view of the angle protractor. Fig. 3 is an enlarged v detail sectional view illustra-ting the adjustable tension joint between the rule sections. Fig. 4 is an edge view of the same.

The rule, as seen in Fig. 1 is of the ordinary construction com rising the two main arms which are hinge together at the point 1 each arm embodying the sections 2 and 3 which are jointed together at their meetingr ends at the joints 4. Each of the joints 1 and 4 is constructed as illust-rated in detail in Figs. 3 and 4 wherein it will be observed that the sections 2 and 3, for exemple, are rovided with the usual scales or plates 5 asteiied to the respective sections and projecting beyond the adjacent ends of the sections so as to receive the pivot which forms the joint. The usual spacing sieeves 6 are also interposed between the overlapping ends of the scales or plates 5 as shown in Fig. 3,

with the exception that under the present invention the outer extremities of the sleeve members 6 are counter-sunk on a bevel as shown at 7 to receive a pair of end to end inner sleeves or tubular clampino elements S and 9 one of which has a smooth bore to receive the smooth portion of the shank of a tension screw 10, while the other inner sleeve is internally threaded to be engaged b the threaded portion of the screw 10 as c early shown in Fig. 3. Thus, bytightening the screw 10, t e op ositely arranged inner sleeves 7 and 8 may e drawn togetherso' as to cause the outer flaring ends or beveled shoulders thereof to co-act with the outer s acing sleeves and produce the eil'ect of bin( ing or clamping the loint moie-or`less, according to 65 the desire of t e owner of the rule. This as the desired effect of ieventing the untimely collapse of the rule y the too easy bending or iiexing of the joints thereof. It is also preferred to provide the outer end of the sleeve 8 with a screw-driver nick 11 so that looseness in the joint may be taken up from either end. "x

In addition to the joint above described which also occurs at the point 1 Vwhere the I5k i arms of the rule connect, employ a graduated angle protractor disk 12 which is fixed relatively' to one of the rule arms and movable relatively to the other arm, the disk being provided with graduations to represent degrees of angles and adapted to register with the inner edge of the rule arm which is movable relatively to the protracting disk. This enables the workmen to lay off any desired angle without figuring the same out inS the usuzil manner. Having thus described the invention, what is claimed as new, is 1. A rulel joint comprising overla ping plates, spacing sleeves engaging said p ates, tubular clamping elements extending int-o said sleeves and provided with beveled shoulders which cooperate with corres ending shoulders of the op osiiig sleeves, am means for drawing said c amping elements toward each other.

5 end to end Within the spacing sleeve Sections,

2. An adjust-able tension 'oilrffor rules "embodying overlapping scales \Qr plates, spacing sleeve sections having i`benring against said scales, inner sleeves arranger one of which inner sleeves is internally 'Witnessesz .v ....-v..v. Wmr... 4. .r..... 

